Traceback (most recent call last):
File "/opt/omero/web/venv3/lib64/python3.6/site-packages/django/core/handlers/exception.py", line 47, in inner
response = get_response(request)
File "/opt/omero/web/venv3/lib64/python3.6/site-packages/django/core/handlers/base.py", line 181, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/opt/omero/web/venv3/lib64/python3.6/site-packages/omeroweb/decorators.py", line 544, in wrapped
retval = f(request, *args, **kwargs)
File "/opt/omero/web/venv3/lib64/python3.6/site-packages/omero_figure/views.py", line 602, in roi_rectangles
json_data.append(encoder.encode(roi))
File "/opt/omero/web/venv3/lib64/python3.6/site-packages/omero_marshal/encode/encoders/roi.py", line 29, in encode
shapes.append(shape_encoder.encode(shape))
Exception Type: AttributeError at /figure/roiRectangles/247940/
Exception Value: 'NoneType' object has no attribute 'encode'
Seen on demo server: